Giant electrocaloric effect in the thin film relaxor ferroelectric 0.9 PbMg_(1/3)Nb_(2/3)O_3 - 0.1 PbTiO_3 near room temperature
A.S. Mischenko, Q. Zhang, R.W. Whatmore, and N.D. Mathur
TL;DR
This paper reports a significant electrocaloric effect in thin film relaxor ferroelectric materials near room temperature, expanding potential cooling applications.
Contribution
Demonstrates a giant electrocaloric effect in 260 nm relaxor ferroelectric films near 60°C, closer to room temperature than previous materials.
Findings
Electrocaloric effect of 5 K in 25 V in relaxor ferroelectric films
Operates near 60°C, closer to room temperature
Potential for novel cooling system applications
Abstract
We have recently observed a giant electrocaloric effect (12 K in 25 V) in 350 nm sol-gel Pb Zr_0.95 Ti_0.05 O_3 films near the ferroelectric Curie temperature of 242oC. Here we demonstrate a giant electrocaloric effect (5 K in 25 V) in 260 nm sol-gel films of the relaxor ferroelectric 0.9 PbMg_(1/3)Nb_(2/3)O_3 - 0.1 PbTiO_3 near the Curie temperature of 60oC. This reduction in operating temperature widens the potential for applications in novel cooling systems.
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